Highly efficient Cu-decorated iron oxide nanocatalyst for low pressure CO2 conversion
| Autor: | David J. Gosztola, Hsien-Hau Wang, Martina Kilianová, Radek Zbořil, David Milde, Aleš Panáček, Ondřej Tomanec, Robert Prucek, Stefan Vajda, Petr Suchomel, Libor Kvítek, Bing Yang, Avik Halder, Eric C. Tyo, Soenke Seifert |
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| Rok vydání: | 2018 |
| Předmět: |
Hydrogen
Chemistry Process Chemistry and Technology Inorganic chemistry Iron oxide chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Heterogeneous catalysis 01 natural sciences Copper Catalysis XANES 0104 chemical sciences chemistry.chemical_compound 0210 nano-technology General Environmental Science Electrochemical reduction of carbon dioxide Carbon monoxide |
| Zdroj: | Applied Catalysis B: Environmental. 225:128-138 |
| ISSN: | 0926-3373 |
| Popis: | We report a nanoparticulate iron oxide based catalyst for CO2 conversion with high efficiency at low pressures and on the effect of the presence of copper on the catalyst’s restructuring and its catalytic performance. In situ X-ray scattering reveals the restructuring of the catalyst at the nanometer scale. In situ X-ray absorption near edge structure (XANES) shows the evolution of the composition and oxidation state of the iron and copper components under reaction conditions along with the promotional effect of copper on the chemical transformation of the iron component. X-ray diffraction (XRD), XANES and Raman spectroscopy proved that the starting nanocatalyst is composed of iron oxides differing in chemical nature (α-Fe2O3, Fe3O4, FeO(OH)) and dimensionality, while the catalyst after CO2 conversion was identified as a mixture of α-Fe, Fe3C, and traces of Fe5C2. The significant increase of the rate CO2 is turned over in the presence of copper nanoparticles indicates that Cu nanoparticles activate hydrogen, which after spilling over to the neighbouring iron sites, facilitate a more efficient conversion of carbon dioxide. |
| Databáze: | OpenAIRE |
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